Induction coil magnetometer
New calculation methodology based on a minimum mass approach enabled us to minimize the weight while conserving the length necessary to provide low noise levels in a wide frequency band. The magnetic feedback design is utilized to provide a stable response over several decades of frequency. Over the flat band region the sensor operates as a B field detector; for the frequencies below the flat part the sensor response is proportional to signal frequency or to dB/dt derivative. A low noise preamplifier is placed inside the sensor.
The LEMI-134 induction coil is used for active geophysical measurements like CSAMT in a wide frequency range. The band of frequencies the sensor operates in is suited for shallow applications like hydro-geophysics or mining.
Low noise, near the theoretically lowest possible level
Wide operation frequency band 0.5…50,000 Hz (0.5 to 200,000 Hz on special request)
Extremly light weight
Small outer dimensions
- Frequency range: 0.5 Hz to 50,000 Hz (0.5 Hz to 200,000 Hz on request)
- Transformation factor in linear part: 4 mV/nT*Hz
- Transformation factor in flat part: 20 mV/nT
- Length: 400 mm
- Weight: 320 g
- Power consumption: 300 mW